Which of the following correctly represents the relation between the number of free electrons ne and number of holes nh for an intrinsic semiconductors?
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A.
ne > nh
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B.
ne < nh
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C.
ne = nh
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D.
ne = nh ²
Correct Answer:
C. ne = nh
Explanation:
In an intrinsic or pure semiconductor, the number of free electrons in the conduction band is exactly equal to the number of holes in the valence band. This occurs because each free electron is generated by the thermal excitation of a valence electron, which leaves behind a corresponding hole. Therefore, the carrier concentrations are balanced, making ne = nh the correct relationship.
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